HP StorageWorks EVA Cluster Extension Software Installation Guide (T3667-96044, April 2010)

quorum In MSCS: A cluster resource that has been configured to control the cluster,
maintaining essential cluster data and recovery information. In the event of a
node failure, the quorum acts as a tiebreaker and is transferred to a surviving
node to ensure that data remains consistent within the cluster.
RHCS Red Hat Cluster Suite
RPM Red Hat package manager.
SAN Storage area network. A network of storage devices available to one or more
servers.
SCSI Small Computer Systems Interface. A standard, intelligent parallel interface for
attaching peripheral devices to computers, based on a device-independent
protocol.
secondary site The data center location with the mirror copy of the quorum disk pair.
SLE HA SUSE Linux Enterprise High Availability Extension
SMI-S Storage Management Initiative Specification.
source A term used to describe the virtual disk or virtual array where an original I/O
is stored before replication.
See also destination.
split-brain
syndrome
A state of data corruption that can occur if a cluster is re-formed as subclusters
of nodes at each site, and each subcluster assumes authority, starting the same
set of applications and modifying the same data.
SPOCK Single Point of Connectivity Knowledge website. SPOCK is the primary portal
used to obtain detailed information about supported HP StorageWorks product
configurations.
SPOF Single point of failure.
SSL Secure Sockets Layer.
SSSU Storage System Scripting Utility. An HP StorageWorks command interface used
to configure and control EVAs.
storage system An EVA.
See also EVA, virtual array.
SUM Software Update Manager.
TB Terabyte. Equivalent to 1,000 Gb for data storage and statistics, or 1,024 Gb
for memory.
vdisk Virtual disk. A simulated disk drive created by the controllers as storage for one
or more hosts. The virtual disk characteristics, chosen by the storage administrator,
provide a specific combination of capacity, availability, performance, and
accessibility. A controller pair simulates the characteristics of the virtual disk by
deploying the disk group from which the virtual disk was created.
The host computer sees the virtual disk as “real,” with the characteristics of an
identical physical disk.
EVA Cluster Extension Software Installation Guide 47